I agree with Ann. Start over before you reinstall.
Subtitles has some issues, so I would create several test projects before spending a lot of time. Create a new Encore project and import only one timeline. Add the subtitles. Try to build to a folder. Etc.
Once you are convinced it will work, do the whole project.
If you have a problem with the test projects, let us know and we'll work on that.
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